/ Dictionary / Index O overthrust: Meaning and Definition of Find definitions for: o•ver•thrust Pronunciation: (ō'vur-thrust"), [key] — n. Geol. a thrust fault with a low dip and a large slip. a thrust fault in which the hanging wall was the one that moved (opposed to underthrust). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. overthrow overthrust belt Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language